Valve body assembly of lift valve

Abstract

The utility model relates to a lift valve body assembly, which belongs to the technical field of soot blower lift valves, and comprises a shell seat, a mounting seat connecting flange, an outlet connecting seat, a positioning bolt, a switch valve seat, a valve rod sealing seat, a valve rod, a reset spring and a valve plate, the shell seat is communicated with a mounting seat connecting flange, the outer side of the shell seat is communicated with an outlet connecting seat, the surface of the shell seat is in threaded connection with a positioning bolt, and a valve rod sealing seat is mounted on the surface of the shell seat; and a switch valve seat which is arranged opposite to the mounting seat connecting flange and is positioned below the outlet connecting seat is mounted in the shell seat. According to the lift valve body assembly, the arranged rolling driving assembly is connected with the driver through the fastening screw, the driver drives the rolling driving assembly to move, through sealing protection of the sealing assembly, opening and closing of the valve body are achieved under the closed condition, and the phenomena that the valve body is rusted and stuck and the sealing performance is affected due to the influence of the external environment are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of soot blower lift valves, and specifically relates to a lift valve body assembly. Background Art

[0002] A soot blower lift valve is a valve used in equipment such as boilers and heat exchangers, mainly used to control the working state of the soot blower. The main function of the soot blower is to remove the accumulated ash inside the equipment to improve the heat exchange efficiency and the operating safety of the equipment. The role of the lift valve is to control the opening and closing of the soot blower to ensure that it can be started in time when ash removal is required, and at the same time, it can be quickly closed after ash removal is completed to avoid unnecessary energy loss and equipment damage. Usually, the design of the lift valve needs to consider characteristics such as high temperature resistance and corrosion resistance to meet the requirements of high temperature and high pressure environments such as boilers.

[0003] Among them, during the control switch process of the lift valve, the driver drives the connecting arm to rotate, thereby pressing the valve stem. The return spring is compressed synchronously, and at the same time drives the valve plate on the valve stem to move downward to open. When the driver moves back, the return spring stretches and resets, realizing the upward reset of the valve plate. Therefore, the connecting arm, return spring, valve stem and seal are all exposed to the air, and are easily affected by moisture and dust in the air, resulting in problems such as rust jamming and connection sealing;

[0004] Therefore, this application designs a lift valve body assembly that is driven to open and close under sealed protection conditions to solve this defect of the prior art. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides a lift valve body assembly, which has advantages such as being driven to open and close under sealed protection conditions.

[0006] To achieve the above object, the utility model provides the following technical solution: A lift valve body assembly, including a housing seat, a mounting seat connection flange, an outlet connection seat, positioning bolts, a switch valve seat, a valve stem seal seat, a valve stem, a return spring and a valve plate;

[0007] The housing seat is communicated with the mounting seat connection flange, the outside of the housing seat is communicated with the outlet connection seat, the surface of the housing seat is threadedly connected with positioning bolts, the surface of the housing seat is provided with a valve stem seal seat, a switch valve seat opposite to the mounting seat connection flange and located below the outlet connection seat is installed inside the housing seat, a valve stem sliding through the switch valve seat is installed inside the valve stem seal seat, a valve plate fitting with the surface of the switch valve seat is installed at the lower end of the valve stem, and a return spring is installed between the outside of the valve stem and the valve stem seal seat;

[0008] A sealing component for sealed protection is provided on the surface of the housing seat;

[0009] A rolling drive assembly is provided on the valve stem to drive the valve stem to move up and down and is sealed by the sealing assembly.

[0010] As a preferred technical solution of the present invention, the sealing assembly includes a telescopic hose installed between the housing seat and the valve stem outside the return spring. A protective seat is installed on the upper end surface of the valve stem, and a cover plate is installed at the opening of the protective seat. A moving hole is provided on the outer side of the protective seat, and a telescopic bellows communicating with the moving hole is installed on the outer side of the protective seat.

[0011] Adopting the above technical solution is convenient for sealing and protecting the driving structure.

[0012] As a preferred technical solution of the present invention, the contraction length of the telescopic hose is greater than the maximum compression length of the return spring.

[0013] Adopting the above technical solution avoids the stretching and contraction of the return spring being involved and blocked by the telescopic hose.

[0014] As a preferred technical solution of the present invention, the rolling drive assembly includes a rolling extrusion member and a disassembly member;

[0015] The rolling extrusion member,

[0016] includes an inclined substrate installed on the bottom wall of the inner cavity of the protective seat and a connecting rod installed through the telescopic bellows and passing through the moving hole. A roller seat is slidably sleeved outside the connecting rod, and a roller contacting the inclined substrate is rotated in the roller seat;

[0017] Among them, a limiting seat fitting the surface of the roller seat is installed outside the connecting rod, and a connecting seat is installed at the outer end of the connecting rod.

[0018] Adopting the above technical solution is convenient for pushing the protective seat and the valve stem to move down by rolling movement.

[0019] As a preferred technical solution of the present invention, the disassembly member,

[0020] includes a threaded rod installed at one end of the connecting rod, and a locking nut threadedly connected to the outside of the threaded rod and contacting the roller seat. The roller seat is limited and fixed between the limiting seat and the locking nut.

[0021] Adopting the above technical solution is convenient for disassembling and replacing the roller seat.

[0022] As a preferred technical solution of the present invention, when the telescopic bellows is in a fully extended state, the roller is located at the rightmost side of the inclined substrate, and the return spring is in a fully compressed state.

[0023] With the above technical solution, it is ensured that the rolling of the roller can achieve the complete compression of the return spring.

[0024] As a preferred technical solution of the present utility model, a perforation through which the connecting rod passes is provided on the roller seat, and the upper surface of the inclined substrate is inclined upward at an angle of 45 degrees from left to right.

[0025] With the above technical solution, it is convenient to push the inclined substrate downward when the roller moves along the inclined surface through the inclined surface setting.

[0026] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0027] For the lift valve body assembly, the rolling drive assembly provided is connected to the driver through fastening screws, and the driver is driven to drive the rolling drive assembly to move. Through the sealing protection of the sealing assembly, the opening and closing of the valve body are realized under closed conditions, avoiding the phenomena of rust jamming and affecting the sealing performance caused by the influence of the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of the present utility model;

[0029] Figure 2 is a partial cross-sectional view of the present utility model;

[0030] Figure 3 is a side perspective view of the present utility model;

[0031] Figure 4 is the present utility model Figure 2 side view.

[0032] In the figure: 1, housing seat; 2, mounting seat connection flange; 3, outlet connection seat; 4, positioning bolt; 5, switch valve seat; 6, valve stem seal seat; 7, valve stem; 8, return spring; 9, valve plate; 10, telescopic hose; 11, protective seat; 12, cover plate; 13, telescopic bellows; 14, inclined substrate; 15, moving hole; 16, connecting rod; 17, roller seat; 18, roller; 19, threaded rod; 20, limit seat; 21, locking nut; 22, connection seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] Please refer to Figures 1 to 2 , a lift valve body assembly in this embodiment includes a housing seat 1, a mounting seat connection flange 2, an outlet connection seat 3, positioning bolts 4, a switching valve seat 5, a valve stem seal seat 6, a valve stem 7, a return spring 8, and a valve plate 9.

[0035] A plurality of annularly equally spaced flange holes are provided on both the mounting seat connection flange 2 and the outlet connection seat 3.

[0036] The housing seat 1 is connected to the mounting seat connection flange 2, the outside of the housing seat 1 is connected to the outlet connection seat 3, the surface of the housing seat 1 is threadedly connected with positioning bolts 4, the surface of the housing seat 1 is fixedly installed with a valve stem seal seat 6, and a switching valve seat 5 is fixedly installed inside the housing seat 1 to partition and seal the housing seat 1, which is disposed opposite to the mounting seat connection flange 2 and is located below the outlet connection seat 3. A valve stem 7 slides through the switching valve seat 5 inside the valve stem seal seat 6. A valve plate 9 that is closely attached to the surface of the switching valve seat 5 is fixedly installed at the lower end of the valve stem 7, and a return spring 8 is installed between the outside of the valve stem 7 and the valve stem seal seat 6.

[0037] In this embodiment, a sealing component for sealing and protecting is provided on the surface of the housing seat 1.

[0038] It should be noted that the sealing component includes a telescopic hose 10 installed and fixed between the housing seat 1 and the valve stem 7 and located outside the return spring 8. A protective seat 11 is fixedly installed on the upper end surface of the valve stem 7. A cover plate 12 for sealing the opening is installed and fixed at the opening of the protective seat 11 through fastening screws. A moving hole 15 is provided on the outside of the protective seat 11, and a telescopic bellows 13 communicated with the moving hole 15 is fixedly installed on the outside of the protective seat 11.

[0039] Among them, the telescopic hose 10 is a plastic hose that can be extended and contracted.

[0040] The contracted length of the telescopic hose 10 is greater than the maximum compression length of the return spring 8.

[0041] Please refer to Figures 3 to 4 , a rolling drive component for driving the valve stem 7 to move up and down and sealed by the sealing component is provided on the valve stem 7 in this embodiment.

[0042] It should be noted that the rolling drive component includes a rolling extrusion part and a disassembly part.

[0043] The rolling extrusion part,

[0044] It includes an inclined substrate 14 fixedly installed on the bottom wall of the inner cavity of the protective seat 11, and a connecting rod 16 installed to penetrate through the telescopic bellows 13 and pass through the moving hole 15. A roller seat 17 is slidably sleeved on the outside of the connecting rod 16, and a roller 18 in contact with the inclined substrate 14 is rotatably arranged on the inner circumference of the roller seat 17.

[0045] Among them, the telescopic bellows 13 is fixedly connected to the connecting rod 16, and the arrangement of the moving hole 15 ensures that the connecting rod 16 does not block the downward movement of the protective seat 11.

[0046] Among them, a limiting seat 20 that fits the surface of the roller seat 17 is fixedly installed on the outside of the connecting rod 16, and a connecting seat 22 is installed at the outer end of the connecting rod 16.

[0047] A through hole through which the connecting rod 16 passes is provided on the roller seat 17, and the upper surface of the inclined substrate 14 slopes upward at an angle of 45 degrees from left to right.

[0048] Among them, the limiting seat 20 is connected to the output end of the electric actuator of the soot blower through a fastening screw, and is used to pull the connecting rod 16 on the limiting seat 20 to move.

[0049] The disassembling part

[0050] It includes a threaded rod 19 fixedly installed at one end of the connecting rod 16 located inside the protective seat 11. A locking nut 21 in contact with the roller seat 17 is threadedly connected to the outside of the threaded rod 19, and the roller seat 17 is limited and fixed between the limiting seat 20 and the locking nut 21.

[0051] When the telescopic bellows 13 is in a fully extended state, the roller 18 is located at the rightmost side of the inclined substrate 14, and the return spring 8 is in a fully compressed state.

[0052] The working principle of the above embodiment is as follows:

[0053] During use, the connecting seat 22 is fixedly connected to the driver of the soot blower through screws. When the driver works to drive the connecting rod 16 on the connecting seat 22 to move, the telescopic bellows 13 extends, and drives the roller 18 on the roller seat 17 to roll and move on the inclined surface of the inclined substrate 14;

[0054] Thus, during the upward movement of the roller 18 along the inclined surface of the inclined substrate 14, the position of the roller 18 is fixed to press and move the protective seat 11 downward, so that the protective seat 11 moves downward through the moving hole 15, pushes the valve stem 7 downward, and the return spring 8 and the telescopic hose 10 contract synchronously, and the downward movement of the valve plate 9 is realized. At the same time, the driver drives the connecting rod 16 to move back, and then under the action of the expansion and contraction and reset of the return spring 8, the valve stem 7 and the valve plate 9 can be driven to move upward to fit with the valve stem sealing seat 6 to achieve closing;

[0055] In addition, the telescopic hose 10, the protective seat 11, the cover plate 12 and the telescopic bellows 13 are combined to form a sealed space, ensuring sealing protection without affecting the drive linkage, and avoiding problems such as component rust jamming and sealing performance degradation caused by moisture and dust in the air.

[0056] In addition, when it is necessary to replace the roller 18, the cover plate 12 is opened and the locking nut 21 is rotated to loosen it, then the roller seat 17 can be pulled out from the connecting rod 16 to achieve replacement.

[0057] The electrical components mentioned in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer for control, and the existing publicly disclosed electrical connection technologies are not elaborated in the text.

Claims

1. A lift valve body assembly, comprising a housing seat (1), a mounting seat connecting flange (2), an outlet connecting seat (3), positioning bolts (4), a switching valve seat (5), a valve stem seal seat (6), a valve stem (7), a return spring (8) and a valve plate (9); The housing seat (1) is connected to the mounting seat connecting flange (2), the outside of the housing seat (1) is connected to the outlet connecting seat (3), the surface of the housing seat (1) is threadedly connected with the positioning bolts (4), the surface of the housing seat (1) is provided with the valve stem seal seat (6), inside the housing seat (1) there is installed a switching valve seat (5) which is arranged opposite to the mounting seat connecting flange (2) and is located below the outlet connecting seat (3), a valve stem (7) sliding through the switching valve seat (5) is installed inside the valve stem seal seat (6), a valve plate (9) fitting the surface of the switching valve seat (5) is installed at the lower end of the valve stem (7), and a return spring (8) is installed between the outside of the valve stem (7) and the valve stem seal seat (6); It is characterized in that: The surface of the housing seat (1) is provided with a sealing component for sealing protection; On the valve stem (7) there is provided a rolling drive component which drives the valve stem (7) to move up and down and is sealed by the sealing component.

2. The lift valve body assembly according to claim 1, wherein: The sealing component includes a telescopic hose (10) installed between the housing seat (1) and the valve stem (7) and located outside the return spring (8), a protection seat (11) is installed on the upper end surface of the valve stem (7), a cover plate (12) is installed at the opening of the protection seat (11), a moving hole (15) is provided on the outside of the protection seat (11), and a telescopic bellows (13) communicated with the moving hole (15) is installed on the outside of the protection seat (11).

3. The lift valve body assembly according to claim 2, characterized in that: The contraction length of the telescopic hose (10) is greater than the maximum compression length of the return spring (8).

4. The lift valve body assembly according to claim 3, characterized in that: The rolling drive component includes a rolling extrusion part and a disassembly part; The rolling extrusion part, comprises an inclined substrate (14) installed on the bottom wall of the inner cavity of the protection seat (11) and a connecting rod (16) installed to penetrate through the telescopic bellows (13) and pass through the moving hole (15), a roller seat (17) is slidably sleeved on the outside of the connecting rod (16), and a roller (18) contacting the inclined substrate (14) is rotatably installed inside the roller seat (17); Wherein, a limit seat (20) fitting the surface of the roller seat (17) is installed on the outside of the connecting rod (16), and a connecting seat (22) is installed at the outer end of the connecting rod (16).

5. The lift valve body assembly according to claim 4, characterized in that: The disassembly part, comprises a threaded rod (19) installed at one end of the connecting rod (16), a locking nut (21) threadedly connected to the outside of the threaded rod (19) and contacting the roller seat (17), and the roller seat (17) is limited and fixed between the limit seat (20) and the locking nut (21).

6. The lift valve body assembly according to claim 5, characterized in that: When the telescopic bellows (13) is in a fully extended state, the roller (18) is located at the rightmost side of the inclined substrate (14), and the return spring (8) is in a fully compressed state.

7. The lift valve body assembly according to claim 4, characterized in that: The roller seat (17) is provided with a perforation through which the connecting rod (16) passes, and the upper surface of the inclined substrate (14) is inclined upward at an angle of 45 degrees from left to right.

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